Hello @টুহি
Up to now, MIUI 10 Global Stable ROM has been rolling out for Redmi S2/Y2.
Also, MIUI 10 for Redmi Note 5/Pro, Mi 6, Mi MIX 2, Mi 5, Mi Note 2, Mi MIX released during 11th September to 13rd September, 2018.
It means the users who are using the above devices will receive the update earlier, while others may receive the update later. For users of other devices, please stay tuned to the forum. Thanks for your patience and understanding.